Hybrid system for a vehicle and vehicle comprising the same

Abstract

A hybrid system for a vehicle including a hybrid machine and a transmission arrangement that includes a first, a second and a third planetary gear set each including a sun gear, a planet carrier and a ring gear, the transmission arrangement further including five shift elements engageable in combinations of two to obtain six forward gear stages, wherein the ring gear of the first planetary gear set and the planet carrier of the second planetary gear set are operatively connected to each other, the ring gear of the second planetary gear set and the planet carrier of the third planetary gear set are operatively connected to each other, two planetary members of the third planetary gear set are selectively connectable to each other by a single one of the shift elements, wherein the hybrid machine and the ring gear of the first planetary gear set are connected to each other.

The invention claimed is: 
     
       1. A hybrid system for a vehicle, the hybrid system comprising a hybrid machine and a transmission arrangement, wherein the transmission arrangement comprises a transmission housing, an input shaft, and an output shaft, the transmission arrangement further comprising a first, a second and a third planetary gear set each comprising a first, a second and a third planetary member, said planetary members being a sun gear, a planet carrier and a ring gear, the transmission arrangement further comprising five shift elements engageable in combinations of two to obtain six forward gear stages, wherein the ring gear of the first planetary gear set and the planet carrier of the second planetary gear set are operatively connected to each other, the ring gear of the second planetary gear set and the planet carrier of the third planetary gear set are operatively connected to each other, two planetary members of the third planetary gear set are selectively connectable to each other by a single one of the shift elements, and wherein the hybrid machine and the ring gear of the first planetary gear set are connected to each other. 
     
     
       2. The hybrid system according to  claim 1 , further comprising an additional transmission arrangement operatively connected to the output shaft of the transmission arrangement. 
     
     
       3. The hybrid system according to  claim 2 , wherein the additional transmission arrangement comprises a first gear wheel operatively connected to the output shaft and a second gear wheel arranged in meshed connection with the first gear wheel for guiding the torque from the transmission arrangement to a vertically lower position in comparison to the output shaft. 
     
     
       4. The hybrid system according to  claim 1 , wherein the output shaft is operatively connected to the planet carrier of the first planetary gear set. 
     
     
       5. The hybrid system according to  claim 1 , wherein the input shaft is connected to the sun gear of the third planetary gear set. 
     
     
       6. The hybrid system according to  claim 5 , wherein the transmission arrangement further comprises a fourth planetary gear set comprising a sun gear, a planet carrier and a ring gear, the fourth planetary gear set being operatively connected between the input shaft and the sun gear of the third planetary gear set. 
     
     
       7. The hybrid system according to  claim 6 , wherein the input shaft is operatively connected to the sun gear of the fourth planetary gear set. 
     
     
       8. The hybrid system according to  claim 6 , wherein the input shaft is selectively connectable to the planet carrier of the fourth planetary gear set. 
     
     
       9. The hybrid system according to  claim 6 , wherein the ring gear of the fourth planetary gear set is selectively connectable to the transmission housing. 
     
     
       10. The hybrid system according to  claim 6 , wherein the planet carrier of the fourth planetary gear set is operatively connected to the sun gear of the third planetary gear set. 
     
     
       11. The hybrid system according to  claim 1 , wherein the sun gear and the ring gear of the third planetary gear set are selectively connectable to each other. 
     
     
       12. The hybrid system according to  claim 1 , wherein the sun gear and the planet carrier of the third planetary gear set are selectively connectable to each other. 
     
     
       13. The hybrid system according to  claim 1 , wherein the five shift elements comprise two locking mechanisms and three connecting mechanisms. 
     
     
       14. The hybrid system according to  claim 1 , wherein the sun gear of the first planetary gear set and the sun gear of the second planetary gear set are operatively connected to each other. 
     
     
       15. The hybrid system according to  claim 1 , wherein the sun gear of the first planetary gear set and the transmission housing are selectively connectable to each other. 
     
     
       16. The hybrid system according to  claim 1 , wherein the sun gear of the second planetary gear set and the transmission housing are selectively connectable to each other. 
     
     
       17. The hybrid system according to  claim 1 , wherein the planet carrier of the second planetary gear set and the ring gear of the third planetary gear set are selectively connectable to each other. 
     
     
       18. The hybrid system according to  claim 1 , wherein the ring gear of the third planetary gear set and the transmission housing are selectively connectable to each other. 
     
     
       19. The hybrid system according to  claim 1 , wherein the sun gear of the third planetary gear set and the planet carrier of the second planetary gear set are selectively connectable to each other. 
     
     
       20. The hybrid system according to  claim 1 , wherein the hybrid machine is operatively connected to an energy storage device. 
     
     
       21. The hybrid system according to  claim 1 , wherein the hybrid machine is one of a hydraulic machine and an electric machine. 
     
     
       22. A vehicle comprising a prime mover and a driveline connected to the prime mover, wherein the driveline comprises a hybrid system according to  claim 1 .